from urllib import request

url =   'http://www.baidu.com/'

header = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36'
}

rq = request.Request(url, headers=header)

#print(rq)

resp = request.urlopen(rq)

print(resp.read())